Let's Compare Parts Of Network+

From Proprofs

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Just like when I compared the different operating systems, I was thinking the same should be done for Network+. But this time I could not get going without the help of cbrzana who has already added to the list, and gave me the push needed to go ahead and post it here in the wiki part so all members can add to it. The main thing to remember is to tell us what is different about different parts of Networking.

Each side of a bridge or repeater is considered a segment. Each side of a router is considered a (separate) network.

Forward traffic means to pass packets from one side of the bridge to the other. Filter traffic means to stop the packet from crossing from one network to the next.

Working with coax-based Ethernet network, the connector is;

BNC (Thinnet) AUI (Thicknet)

Ethernet speed--10Mbps, 100Mbps, 1000Mbps Token Ring speed--4Mbps, 16Mbps

A connection between two systems is known as a “session.”

NetBEUI is a nonroutable protocol

Unicast traffic is sent from one machine to another Broadcast traffic is sent to all machines

Hubs operate at level 1 Repeaters operate at level 1 Switches operate at level 2 Bridges operate at level 2 Routers operate ar level 3

When talking about TCP/IP, “gateway” is another word for router

In bus topology the ends must be terminated

In a coax based Ethernet connection; Use a BNC for Thinnet Use a AUI for Thicknet

NIC cards using coax are half duplex

NIC cards using fiber or UTP are full duplex

To “filter” traffic means to stop it from crossing over To “forward” traffic means to let it pass (like from one side of a bridge to the other)

DNS resolves FQDN to IP Address

WINS resolves NetBIOS name to IP Address

DNS uses HOST file

NetBIOS uses LMHOSTS file

NetBEUI = Transport Layer

NetBIOS = Session Layer

UNIX is not open source, LINUX is.

ifconfig is unix equivalent of ipconfig command.

dig is unix equivalent of nslookup.

POP3/IMAP receives mail

SMTP sends mail

IPv4 uses 32 bits

IPv6 uses 128 bits

MAC address uses 12 Hex digits (48 bits)

NetBIOS name <= 15 characters

IPX/SPX Addresses use 8 Hex digits for Network ID, and 12 Hex (MAC address)

AppleTalk uses 24-bit address, first 16 bits for Network ID

Repeaters and Bridges Pass Broadcast packets by default

Routers don't pass broadcast packets by default

802.11a,b,g use DSSS

Bluetooth Uses FHSS

Hubs, MAUs, Repeaters and Transceivers operate at Layer 1

Bridges, Switches, and WAPs operate at Layer 2

Routers and Layer 3 Switches operate at Layer 3

Gateways operate at Layers 4-7 (Upper Layers)

TCP and SPX operate at the Transport Layer

IP and IPX operate at the Network Layer

ISDN BRI = 128 Kbps, 16 Kbps D channel

ISDN PRI = 1.544 Mbps, 64 Kbps D channel

ISDN BRI is also known as 2B+D

ISDN PRI is also known as 23B+D

Full and Incremental Backups clear the Archive bit

Differential Backups Don't clear the Archive bit

NetWare Log Files are Console.log, Abend.log, and Sys$Log.err

Windows Event Viewer Logs are Application, System, and Security

Class A Subnet: 255.x.x.x, range 1-126

Class B Subnet: 255.255.x.x range 128-191

Class C Subnet: 255.255.255.x range 192-223

Private IP Addresses are:

10.x.x.x

172.16.0.0 – 172.31.255.255

192.168.0.0 – 192.168.255.255

169.254.0.0 – 169.254.255.255

Power Spikes are when power level rises less than 1 second

Power Sags are when power level lowers less than 1 second

Power Surges are when power rises more than 1 second

Brownouts are when power lowers more than 1 second

SLIP = IP, Needs Static IP

PPP = TCP/IP, NetBEUI, IPX, can use Dynamic IP

DES = 56 Bits

Skipjack/Clipper = 80 Bits

CHAP = MD5 Encryption

HTTPS = RC4 Encryption

Token Ring

STP = 260 nodes, 100m cable

UTP = 72 nodes, 45m cable

Connection-Oriented vs Connectionless Protocols

Connection-Oriented, reliable, checks everything before transmission

Connectionless, unreliable, assumes no problems, transmits without checks.

SSL is used to encrypt and decrypt messages using PUBLIC key encryption. (i.e. over the internet)

Kerberos is an authentication tool that uses a PRIVATE key for encryption. (i.e. used by Windows in a LAN)

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